Improvement in balances for weighing



R; BASTMAN. BALANCE FOR WEIGHING.

atented Mar. 13, 1849'.`

UNITED STATES PATENT OFFICE.

ROBERT EASTMAN. OF CONCORD, NEW HAMPSHIRE, SSGNOR TO MARIA L. EASTMAN.

iMPRovEmENT iN BALANcEs Fon weloHiNo;

specificano fnl-ming pmif Leners Patent' Nn. 6,174, datent/inch is, 1849.

.To all whom, it muy concern,.-

Be it'known that I, ROBERT EasrMAN, of Concord, in the county of Merrim'ac and State of New Hampshire, have invented a new and useful improvement in Scales or Balances for Weighing; and I do hereby declare thatthesame is fully described and represented in the. following speciication and accompanyingdrawings, letters, figures, and references thereon. l

Of the said drawings, Figure ldenotes a top view, and Fig. 2 a side'.elevation, .of my irnproved balance. Fig. 3isa transverse and vertical section, taken through the series of wei ghts connected With'the end ofthe scalebea'ln.v Fig.

4 is a vertical and longitudinal. sectionof a part of i the scale-beam aud the said series of weights and their apparatus for -sugcessivel y raising or lowering each of said weights. ,l

In the said drawings, A exhibits the scalebeam o'r graduated lever; resting o n pivots or vbearings at B B, and being made atene-end to support a scale-pan in any proper manner.v (lis the supporting-frame of the scale-lever and other parts. A small circular platform.,V D, is suspended from or hung to the other end of the lever A, by means of two suspensionrods, E F; A verticalv guide-rod, I, extends .upward through the 'said platform, andiis kept in place at its lower end by being ixed in theframe. At its upper end said rod is supported by an arrn, G, made to extend from an upright hollow post, H. The'rod l has a metalliccone, K', iixed upon it in such manner as lto he capable of being raised up and lowered down on the rod. der, M, projecting from a tube, N, extending upward fromthe cone, is supported on an arm,

,0, which extends from a slide-bar, P, arranged within the hollow colunni or'post H, A series of any suitable number of weights, Q RS, is

disposed over t-he platform D, the cone 'K be` ing made to pass through said series of weights. The cone may be provided with three or any other suitable number of shoulders, anges,

-- or projections@ b 0, arranged, respectively,

around it and at its upper end, middle, and lower end of' it, the holes e, j', and g through the Weights being of such dia-meters as to cause the Weights to respectively Arest and be supported on the said ilanges a b c, and entirely above and off the platform D when the concis The said cone, by means of a shoul-v Yelevated to its highest position. The slide-bari Phas a'springcatch, T, extending.' from and applied to it, as seen in Fig. 4the said springcatch being provided with aseries of projections or notches, d ef,w11ich operate in conll nection with a small shelf or pin, g', arranged as seen in the drawings. of the spring-catch a knob or handle, h, extends,

as seen in Figs. 2, 4, there being an. opening orlong vertical slot',l (i, cutthrough the post H, to allow of the passage of the knob out of orl ,through the post and its vertical movementsl Asimilar slot, K, should also be made through` the opposite side or part of the post to allow of the extension of the arm O out of the post, and the vertical movements of said arm. The

platform D should be made with. a hole or passage through it largel enough to admitI of the operations ofthe cone which moves through said platform. The regular poise oi.weight .for weighingv is shown at U as'hung upon a slide, V, placed on the graduated-scale beam. Fig. den'otes -an external or side View -of the slide-bar l?, as it appears when itis removed from the post H. Said slide-bar has certain figures. 0, 5, 10, 15, marked upon' it at suitable heights. These figuresopcrate (as will be hereinafter more readily eXplainedNn connection vWith an orifice or hole, m, made through the side ol the post H', as seen in Fi g. 2.

We will now suppose the div-isions'and subdivisionsof the 'scale-beam to be such as, in,

conjunction with the. poise U, to enable u-s to ascertain the weightof anybody placed in the, scale-panandWeighing-from-oneto tive pounds. lf We desire to `weigh any body or article of a' less .weight than iive pounds, We take hold of theA knob or handle h', and elevate the slide bar P andthe cone K into their highestfposition,and so as toliftall the Weights-Q RS entirely.' oi the platform D, as seen in Fig. 2.

During this operation the upper Weight Wilt be raised rst, the second or.v middle 'weightnext, and so on throughout the series. When theA parts are in this position, and held up by the lower notch, 'f, of the spring-catch T, the O (zero) on the slide-bar should come into such position as to be seen through the hole m. All" this being effected, we proceed to move the poise on the beam until it is brought -into a; level or horizontal position, and theweight is indicated by the divisions of the beam.

From the upper end 'We will next suppose that we Wish. to determine the weight of. n body Weighing over iii/"e pounds and between lve and ten pounds.` We

takeliold of the knob orhaindlek, press inward weiglit S being sucient, when tliepoise isl placed at the commencement of the divisions oi' the scale-beam, to balance iive pounds' placed in ille scale'. I fthe Weight in the scelepen is severi pounds exact-ly, the poise, in order to bring the beam to n level.7 would llave io .be moved to the division 2 of `ilie benin, or that indicating two pounds thereon, and whatever the Weight in the scale-pan may exceed've pounds, the excess may be determined by moving the poise on the beam until the letter is brought into a level position. 'The divisions sind subdivisions will then denote said excess, So if We desire to Weigh a body of over ten and less than fifteen pounds weiglinwe depress the cone until the next weight R is deposited on the Weight S, and until the gnres l0 appear et ine hole m.- The excess of Weight over ten pounds is to be determined on the benin by ineens of the poise. ln weighing over yfifteen (15) pounds end less than twenty (20) pounds, we depress the third and' lest weight; so ns1 to cause it to rest on the weight R, and proceed ns before.

Vlbnlfimce-nrinkers.

W'hnt l eleiim-es my invention is- The sfere-described improvement or eombination as epplied io n sonleloesin, and eomposed of ille following elements or their ineelienicel eqnivaleni's, viz: first, the suspended platform D; second, the series of one, two, or more weights, Q R S; tliird,e. lowering and lifting apparatus, tile saine consisting of time cone K, slide-bnr l?, and reich T, es speeiiied, tlie Wliole bei ng .combined and mede to operate iogetlier essentially/in ille :manner end for tlie purpose, ns'ebove explained; and in eoinloinn-- tion 'with said lifting end lowering apparatus, the seele of figures on tine slide-leoni?, and the hole m, inode tlirongli iiie post H, or their equivalents, the sn-ine being for elie purpose described.

In testimony whereof i have hereto set my signature this 15th dey of Mey, L ll i348.

REERT EASTMAN.

llVitnesses:

Cess. EASTMAN, T. W. KELLY. 

